จำนวน Repository ( 22 )

การเพิ่มเสถียรภาพของระบบไฟฟ้ากำลังด้วยอุปกรณ์  FACTS
การเพิ่มเสถียรภาพของระบบไฟฟ้ากำลังด้วยอุปกรณ์ FACTS

At present the electrical power system has growth and more complicate. Because of the development of the economics and society. An increasing the demand of power transmission line system would be resulted in the stability and reliability. The Flexible AC Transmission System devices: (FACTS) is the equipment which can control the flow of real power. In addition it can gladly encourage the stability and reliability of the power transmission line system. This research proposed the impact of placing power electronics device to increase stability and reliability of power system in order to study the impact of Flexible AC Transmission System devices: (FACTS) devices for the resulting to stability of power system. UPFC devices model which consisted of Static Synchronous Compensator and Static Synchronous Series Compensator that worked as independent voltage source for technique to proposed control the flow of real power and reactive power as well as voltage bus in power system. Testing Simulation power flow control of 5 buses by placing unified power flow control indicated the effective compensation of real power and reactive power in power system.

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การจำลองกังหันลมเชื่อมต่อระบบกริดไฟฟ้า 1 เฟส
การจำลองกังหันลมเชื่อมต่อระบบกริดไฟฟ้า 1 เฟส

This research project presents about wind turbine simulation for connected single phase grid system using hysteresis current control technique to generate PWM signals for controlling a single-phase voltage source inverter. The simulation system presented here uses the program. MATLAB/Simulink in the simulation of the wind turbine connected to the shaft of a three-phase permanent magnet generator is produced by alternating current through the full bridge rectifier circuit. Then the power supply is applied to the single-phase inverter circuit which is connected to the single-phase autotransformer to power transfer to the single-phase grid system. The simulation results confirm the validity of the proposed system with satisfaction under various conditions.

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ผลกระทบจากเอ็นบีทีไอต่อสมรรถนะของวงจรรวมดิจิทัลที่สร้างด้วยเทคโนโลยีฟินเฟต
ผลกระทบจากเอ็นบีทีไอต่อสมรรถนะของวงจรรวมดิจิทัลที่สร้างด้วยเทคโนโลยีฟินเฟต

In FinFET-based VLSI designs heat issues from increase of driving current with temperature and self-heating effect profoundly influence the circuit performance and reliability. This work evaluates the performance of FinFET-based combinational circuits considering BTI stress and thermal effect of supply voltage and frequency variations. The proposed simulation framework is applied to selected benchmark circuits implemented with the 14-nm tri-gate bulk FinFET technology. The experimental results reveal that as temperature increases BTI aging delay increasingly worsens yet it is overridden by performance gain from the increase in driving current. We also prove that BTI degradation is dependent on power supply and frequency through their thermal impacts. Further we introduce a DVFS based power reduction approach that scales down the supply voltage of hot circuits to maintain the performance. The results show that power reduction yielded from the proposed technique is larger for all circuits working at higher ambient temperature (as large as 66% in some experimental circuits working at 20 oC above the baseline ambient temperature) with a slight decrease in BTI degradation.

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การควบคุมกำลังไฟฟ้ารีแอคทีฟเพื่อเพิ่มมูลค่าทางเศรษฐศาสตร์ ในระบบไฟฟ้ากำลัง
การควบคุมกำลังไฟฟ้ารีแอคทีฟเพื่อเพิ่มมูลค่าทางเศรษฐศาสตร์ ในระบบไฟฟ้ากำลัง

To Improvement the power factor is very important. Because the costs are increased or reduced. To Improvement the power factor the higher the value it is necessary to buildings offices and industrial buildings or the fact that the industry needs real power. And reactive power source to operate. This research presents the design and construction of reactive power factor control. Which amounted to 6 working order by the first sequence is divided into three three-phase electrical power system and three consecutive singles phase by active power different. first1 is reactive at 5 kVAr second 2 and third 3 are reactive at 2.5 kVAr forth 4 fifth 5 and sixth 6 precious marine active 0.83 kVAr control. the power factor controller that controls RG3-12 pay Oval active in various sequences. As a result when not equipped with reactive power compensation software to control the power factor. This makes the flow of the high and low Power Factor schedule. When equipped compensate reactive power source to power factor control. Single-phase motor 1 kW and light bulb 1640-watt making the current decline of 14 amps rest 12 amps of the power factor increases from 0.5 to 0.929. When connected to three-phase motor with 2 kW 0.8 2.2 flow down from 2.360 rests 0.942 amps of power factor value up from 0.308 to 1.0.

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การวิเคราะห์ผลกระทบของฮาร์มอนิกเพื่อแก้ปัญหาเศรษฐศาสตร์ในระบบไฟฟ้ากำลัง
การวิเคราะห์ผลกระทบของฮาร์มอนิกเพื่อแก้ปัญหาเศรษฐศาสตร์ในระบบไฟฟ้ากำลัง

This research proposes technical performance evaluation and economic decence for the combination of harmonic correction devices in Industry. Currently an electronic device is popularly applied in power network. Although it is a higher performance device than the existing device it still causes the power quality issues and then network failure. Especially harmonic disturbance in the network it is a harmonic source that generates harmonic current into the network. Many types and solutions are available in the present time therefore the suitable and optimal financial solution must be considered. A network model for the analysis of harmonic correction devices suitable solutions and optimal financial has been established in the simulation software that bases on the power and Break Even Point (BEP) equations. The results of analysis shown that the performance of harmonic correction devices suitable solution and BEP of investment in match to the using of a detuned filter bank and an active harmonic filter (case 8) thus these information will be valued for the end-user.

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